Grille for a floor register



FIG. 1 is a front and top perspective view of a grille for a floor register showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a right side elevation view thereof.

The bottom view of the grille is substantially the same as the top plan view shown in FIG. 2, the rear elevational view is substantially the same as the front elevational view shown in FIG. 3, and the left side view is substantially the same as the right side view shown in FIG. 4.

The broken line showing of a floor register in FIGS. 1, 3, and 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a grille for a floor register, as shown and described. 